I am currently in a position where I have a wonderful boss and coworkers, but do not particularly enjoy what I do. My boss recently announced that he was searching for a new position on the other side of the country and plans on moving the lab this summer, which eliminates my job here. I decided to take that announcement as a kick in the pants to start looking for a job I would love, rather than like. He asked me if I thought I would move with the lab to the West Coast or find a new job here, and I said I was already looking at a few different positions.
Well, it's been 6 weeks, but I just got a call back to interview for my dream job. I'm one of several candidates interviewing that day. As it is, my boss does not keep tabs on my coming and going (I have an open work schedule) so my disappearing for a few hours this Friday would mean nothing to him. Should I tell him that I'm interviewing anyways? Or should I wait until I have a job offer?